Open the Outlook Express,
Select Tools/Accounts on the top menu bar.
A windows called Internet Accounts
pops up:

Click
on the Add button at the upper
right corner of this windows, and then select Mail as
shown below:

Now
you need to write your Real Name
or the name of your business (if
it is an email account for commercial porpuses).
This is important cause it is the
name people gets as "the sender"
of the messages.

Now
enter your email address:

Enter your domain name as the Incoming (POP3)
Server and the Outgoing (SMTP) Server,.

Very Important information

When using your
domain name as the SMTP server,
you must always check for mail before being
allowed to send mail (POP before SMTP).
This is under the advance options Tab

Enter your Account Name and Password as shown
below. This is the same user name and password provided by you web
hosting company.

Click
on the Finish button.

Close
the Internet Accounts window. Ok,
you can now send and receive messages
from your email account.